• Preheat oven to 325°
• Add cupcake liners to cupcake pan, or grease and flour cupcake pan.
• In a large bowl mix together with a fork or a wire whisk, 1 Betty Crocker white cake mix, 3 egg whites, 1 cup of water, and 1/2 cup of oil.
• Wash one lime and dry completely. Zest and juice lime.
• Add lime zest and juice to batter, and mix well.
• Using a 2 inch cookie scoop distribute batter evenly into the cupcake pan. (If using only one pan, repeat the process after pan has cooled from first batch).
• Place in oven and bake for 14-19 min.
• When cupcakes are golden brown remove from oven and let stand for 2-3 min. before removing from pan.
• Let cupcakes cool completely.

Key Lime Butter Cream Frosting

• Wash 1 lime and dry completely. Zest and Juice lime.
• In large bowl add 2 sticks of softened butter, 1½ tsp of vanilla, ½ tsp salt. Mix together using either a hand mixer or a stand mixer with the wire whip attachment.
• Add 2 tbsp heavy cream
• Mix in the zest from 1 lime.
• Slowly add in 4 cups of powered sugar.
• Last, add in lime juice from 1 lime. If the frosting is to runny add more powered sugar, if it is to thick add either more cream of more lime juice.
• Now you can either pipe the frosting on cooled cupcakes or spread on with a butter knife.